These are Polypropylene hinges by Hayes FEATURES: Designed to dampen flutter, withstand high vibration, and resist gumming Performs well in lare (1/4 Scale) Aircraft INCLUDES: Twenty Hinges REQUIRES: Epoxy SPECS: Length: 28.6mm (1.125") Width: 15.9mm (.625") Thickness: 0.685mm (.027") COMMENTS: None jmm 3/30/02 ir/kh